Question

If a sum becomes double in 8 years what is the rate?

Answer 1

Hey

Here is the answer.

Let the principal P be rs. x

so, amount = 2x ......as gets double

So, interest = 2x-x = x

time ,t = 8yrs

As, rate, R = SI × 100 /P ×t

so, R = x ×100/x × 8 = 100/8 = 12.5 %

Thanks.

Answer 2

Hi Friend !!!

Here is ur answer !!!

Let the amount be 2x -----as it gets doubled

SI = 2x-x = x

T = 8 yrs

R = ?

SI = PTR /100

SI ×100/ PT = R

R = X×100/2x×8

R = 100/2×8

R = 6.25%


Hope it helps u : )